133000020 has 36 divisors (see below), whose sum is σ = 403433940. Its totient is φ = 35466624.

The previous prime is 133000009. The next prime is 133000033. The reversal of 133000020 is 20000331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46621584 + 86378436 = 6828^2 + 9294^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 132999966 and 133000011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369265 + ... + 369624.

Almost surely, 2^133000020 is an apocalyptic number.

133000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133000020 is an abundant number, since it is smaller than the sum of its proper divisors (270433920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133000020 is a wasteful number, since it uses less digits than its factorization.

133000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738904 (or 738899 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 133000020 is about 11532.5634617807. The cubic root of 133000020 is about 510.4468977865.

Adding to 133000020 its reverse (20000331), we get a palindrome (153000351).

The spelling of 133000020 in words is "one hundred thirty-three million, twenty", and thus it is an aban number.